WAGO-I/O-SYSTEM 758
Appendix
65
758-915
Bluetooth
®
ETHERNET Gateway
Manual
Version 1.1.0, applicable from FW/HW Version 01/01
The WEG also enables you to also “blacklist” (inhibit) frequency ranges in order
to enhance coexistence between competing technologies:
In the Web-based Management System under “Bluetooth > WLAN
coexistence > Exclude WLAN channel” enter the channel used by the
WLAN; these frequencies will then be permanently blocked (highlighted in
light blue).
After this, repeated transmission will no longer be required, as the transmission
frequencies will not be disturbed (see figure below).
Figure 31:
Bluetooth
®
with AFH and “Chanel blacklisting”
Optimum coexistence can be achieved using a combination of AFH and manual
blocking of WLAN frequency ranges, guaranteeing undisturbed operation at a
maximum transmission rate and minimum transmission and reaction times.
8.4.4
Low Emission Mode
TM
The properties of the
Bluetooth
®
technology and setting options for the WEG
described in the previous sections ensure that optimal coexistence is achieved
when the device is in operation.
In addition to the properties during ongoing operation, frequency utilization for
searching for connectable devices (Inquiry) must also be taken into account.
During this inquiry phase,
Bluetooth
®
devices transmit for up to 10 seconds,
depending on device implementation, at set frequencies without utilizing the
coexistence mechanisms available for ongoing operation. Therefore, if the use of
the
Bluetooth
®
device involves frequent inquiries, such as for roaming, this can
represent a high interference potential for other wireless systems.
